Casement window structure



Jan. 29, 1957 R. ZIESMER 2,779,059

CASEMENT WINDOW STRUCTURE Filed May 14, 1953 INVENTOR. fat/mm Z its/77e! United States Patent 2,779,069 CASEMENT WINDOW STRUCTURE 7 RichardZiesmer, Pittsburgh, Pa. Application May 14, 1953, Serial No. 354,966

.2 Claims. (Cl. 20-53) This invention relates to casement windows. Moreparticularly, the invention relates to casement windows which are hingedto swing outwardly with hinges which carry the sash-a substantialdistance away from the window jamb to permit cleaning of both sides ofthe window panes from the inside of the building.

The inside of a casement window can readily be washed from the inside ofa building and many attempts have been made to swing the windowsoutwardly into a position where the outside of the window may be cleanedfrom the inside of a building. A commonly used type of hinge doesprovide a gap between the window jamb and the hinged edge of the windowsash but the gap is quite narrow and is not satisfactory for cleaningthe outside of a window from the inside of a building. Certain windowsuse a sliding ledge which is designed to give a better opening, butwhich has inherent mechanical difiiculties which my invention overcomes.

The primary object of the present invention is to provide a hingemounting for a casement window which will permit the sash to be easilyopened and closed and will support the sash in opened position where itmay easily be cleaned from the inside of the building.

Another object of the invention is to provide guides in the hingemounting of a casement window which steady and facilitate the openingand closing operation of the sash and act to hold the sash open and tokeep the sash in a tightly closed position.

A further object of the invention is to provide a hinge mounting for acasement window in which the hinge parts act as stops for the full openand closed positions of the sash to prevent the placing of strain on thehinge pivots.

With these and other objects in view, the invention consists in thehinge mounting for a casement window as hereinafter illustrated anddescribed and particularly defined in the appended claims.

The various features of the invention are illustrated in theaccompanying drawings in which:

Fig. 1 is a view in front elevation of a casement window to which thehinge mounting of the present invention is applied;

Fig. 2 is a perspective view of a casement window in open position withone hinge mounting of the present invention thereon;

Fig. 3 is a top plan view of an opened casement window in a window jambwith the preferred hinge mounting of the window in the jamb; and

Fig. 4 is a top plan view of an edge of a casement window in closedposition in the window jamb showing the preferred hinge mounting of thewindow.

The casement windows to which the present invention are preferablyadaptable are metal casement windows which are made of steel oraluminum. Referring to the drawings, the sash is made up of an outerrail member 10 with cross bars 12 for holding the glass 14. The windowsash is hinged by a hinge at the top and the bottom of the window. Eachof these hinges has the same construction and arrangement so that Figs.2, 3

and 4 shows only the top hinge. The sash rails 10 each have an outwardlyprojecting flange 16 which bears against a flat face 18 of thewindowframe 19. The flange 16 extends entirely around the sash and the flatface of the frame extends entirely around the window opening so thatWhen the window sash closes, a flat surface contact is made to make abroad closing fit in the frame.

The hinge is made up of two parts consisting of a hinge arm 20 which ispivotally connected to a bracket 22 attached to the flat face 18 of thewindow jamb 19. The outer end of the arm 20 is pivotally connected by apin 24 to an arm 26 fixed on the flange 16 of the sash rail. The pivot28 of the hinged arm 20 is positioned a substantial distance from theedge of the frame so that when the hinge is moved from the positionshown in Fig. 4 to the position shown in Fig. 3, the sash will be movedover to substantially the central portion of the opening in the windowframe and the sash will stand at approximately right angles to the faceof the frame. In this position shown in Figs. 2 and 3, a wide space 30is provided through which a person may extend an arm to wash the outsideof the sash while standing in the inside of a room in which the windowis located. When the sash is moved from open to closed position, orvice-versa, the arm 20 moves about the hinge pins 28 and 24 in order tobring the sash from the position shown in Figs. 2 and 3 to the positionshown in Figs. 1 and 4.

To cause the sash to open and close smoothly without binding, guide arms32 are pivotally connected to the window rail 10 by a pin 34 and to therail 19 of the frame by a hinged keeper 36. The guide 32 is slidablymounted in the keeper 36 and the keeper is pivoted to the frame by a pin38. A stop pin 40 is mounted in the end of the guide to limit themovement of the guide in the keeper. A flat coiled compression spring 42is mounted around the guide 32 and held between the keeper 36 and a stop44 fixed on the guide. As the window is moved into and out of positionin the jamb, the guide slides through the keeper 36 to provide for thecomplex hinged movement of the hinges. The arrangement of the hinge armsand the guides allows the sash to be moved easily and steadily from anopen to closed position and vice-versa and the spring 42 allows theguide arm 32 to assume the necessary position in providing for the hingemovement. The guides act to accurately position the sash against theframe and the springs 42 at the top and bottom of the window yieldinglypress the sash flange 16 against the face 18 of the jamb to maintain aclose contact of the sash with the window frame.

It will be noted that the movement of the sash outwardly and toward thecenter of the opening of the-window frame is all obtained by the pivotalmovement of the hinge arms 20 and 26 and there are no sliding parts tostick or get out of order.

The hinge arm 20 has a flat face 46 which rests against the face of theframe 18 when the window is closed and a flat face 48 which restsagainst the frame face 18 when the window is open. These two faces limitthe movement of the hinge and prevent the hinge pivots from beingsubjected to undue strain when the sash is opened and closed.

In Fig. 2 is shown a modified form of the frame hinge arm 50 which ishinged by a pin 52 to the sill 19 of the window frame. The hinge arm 50extends through a slot 56 in the sill or header, as the case may be andhas a flat face 58 which engages a flange 60 on the frame member 19 whenthe window is moved into open position. When the window is in closedposition a flat face on the arm 50 similar to the arm face 48 engagesthe top of the face 18 to limit the movement of the hinge arm.

'3 While the presentinvention has special application to metal casementwindows, it is obvious that the hinge mounting of the invention may beapplied to a wooden casement sash in a wooden window frame. Theattachment of the hinges to a wooden window and a metal frame wouldhaveasimilar construction.

To facilitate the movement of the sash from the inside, a lockinghandle-62 is pivoted'to the rail '10 of the sash on the inside whichalso serves for locking the sash in closed position in the frame.

An incidental advantage of my invention is that it gives improved roomventilation because of the window being more nearly centralized whenopen.

The preferred form of the invention having thus been described, what isclaimed as new'is:

window frame to a position perpendicular to such plane,

a second hinge member fixed on the exterior of the sash and projectingnormally from the plane of the sash, the projecting end being pivotallysecured to the free end of the first member, and aresiliently-extensible link pivoted to the frame at one of its ends ata'point on the frame intermediate the side of the frame opposite the oneon which the hinge is mounted and the middle of the frame, said linkhaving its other end pivotally secured to the sash intermediate the twovertical edges of the sash.

2. The combination with a window frame and sash as defined in claim 1 inwhich the extensible link is comprised of two slidably engaged sectionshaving abutments thereon between which a compressionspring is confined,said link acting to yieldably resist opening of the sash from a closedposition.

References Cited in the file of this patent UNITED STATES PATENTS325,333 Flagstad Sept. 1, 1885 1,358,349 Waters Nov. 9, 1920 1,498,996Bray June 24, 1924 1,887,415 Lobell Nov. 8, 1932 2,643,420 Schwartz June30, 1953 FOREIGN PATENTS.

3,531 Great Britain 1880 6,947 Denmark 1904 223,077 Great Britain Oct.24, 1924 282,968 Great Britain Jan. 5, 1928

